Frequently Asked Questions About BESS Solutions

Date: 04/05/26

Here at Think Hire, our BESS solutions have proved so popular with our customers that we are working flat out to keep up with orders for new units. 

So, just what is it that makes these BESS solutions such a popular option for site power delivery, and how are they providing an affordable, flexible, sustainable alternative to traditional diesel generator power?

Here are 15 of the most frequently asked questions about BESS solutions tells you everything you need to know:

• What does BESS stand for? - BESS stands for Battery Energy Storage System, which does what it says on the tin, storing energy in a battery for later use.
• What is a BESS solution? - A BESS solution is a sophisticated rechargeable battery unit that stores electrical energy for distribution at a later time. They are often used to store energy from renewables, such as solar powered generators, or from low-cost grid supplies during off-peak periods, for use when renewables are not available, or when grid energy is more expensive.
• How does a BESS work? - BESS solutions help to manage power demand, delivering a dependable source of electricity whenever and wherever it’s needed. Batteries can be charged by renewables, with back-up generators only used when the battery level dips below a set charge. This significantly reduces fuel use, making companies less vulnerable to rapidly rising fuel prices.
• What are the main benefits of using BESS solutions? - The main benefits of using BESS solutions are :
  Cost savings – through reduced generator run time
  Lower emissions – as a result of lower fuel use
  Quieter operation – providing power without noisy generators
  Flexibility – BESS can be deployed almost anywhere, even off-grid
  Dependability – BESS solutions deliver reliable power 24/7
• Can a BESS replace a diesel generator? - Yes. BESS solutions are often incorporated into sustainable energy systems to provide 24-hour power even when using solar panels. However, larger power demands may still need a backup diesel generator as part of a hybrid system to ensure continuity of supply.
• Does using a BESS save fuel? - Yes. By maximising the use of renewable energy and minimising generator runtime, BESS solutions can deliver significant fuel savings. Even without renewables, BESS ensure generators are run in the most efficient way, cutting costs.
• How much fuel can a BESS save? - Most BESS solutions deliver fuel savings of at least 50%, with many systems delivering fuel savings of 80% or more. The saving depends on the load profile of the site and the source of energy input for the BESS.
• Are BESS solutions sustainable? - Yes. BESS systems are environmentally friendly because they cut the use of diesel fuel, reduce carbon emissions and facilitate the deployment of intermittent sustainable solutions such as solar panels.
• What batteries does a BESS use? - Think Hire BESS use LiFePO4 lithium-ion batteries with a 7000-cycle lifetime recharging capability. These are available in various sizes up to 625kVA, which is enough to power a tower crane or heavy machinery.
• Can using a BESS solve noise issues? - Yes. BESS operate silently during discharge, making them ideal for construction sites in residential areas. BESS can be used to provide site lighting throughout the night without the need for noisy generators.
• Is a BESS portable? - Yes. BESS can be deployed almost anywhere, including remote and off-grid sites, making it a flexible and fully portable energy solution. BESS are also ideal for temporary works, such as road and rail repairs, festivals and emergency operations.
• What size BESS do I need? - The size of BESS you need depends on both your average and your peak energy demands. Think Hire BESS solutions are available from X100 (125kWh, 250kVA peak) to X500 (564kWh, 625kVA peak) across five models, with the X500+ (948kWh) in development for higher-power applications.
• Is a BESS cost effective? - Yes. Even when you factor in additional hire or purchase costs, the fuel savings of a BESS will still cut your operating costs significantly. 
• How do I monitor a BESS? - Think Hire BESS solutions are monitored remotely by our AI-driven Think Energy Panorama system, which automatically fine tunes system performance, fixes faults and ensures continuity of supply at maximum efficiency to cut costs.
• How long does a BESS unit last? - BESS units are designed to last ten to fifteen years. Think Hire BESS batteries have a 7000-cycle lifetime, which means they can be fully charged and discharged twice a day, every working day, for 13½ years.

We hope this article has answered all your questions and demonstrated the many benefits of BESS solutions. If you have any other questions about BESS, or you want to find out more about buying or renting BESS solutions from Think Hire, visit our website or contact our team today.

BESS solutions are the ultimate answer to affordable, flexible, sustainable energy on any site.

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